Terahertz Cylindrical Shell Detection for Solid Rocket Thruster Defects
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Solution Overview
Problem
Current defect detection methods for solid rocket thrusters are either too costly or unable to effectively detect internal defects within the cylindrical shell, leading to potential structural disintegration during high-speed flights.
Innovation Solution
A cylindrical shell detection method utilizing terahertz electromagnetic waves to emit and detect reflected waves on both inner and outer surfaces of the cylindrical shell, allowing for the analysis of characteristic signals to determine defect characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-performance measurement systems are used for defect detection, then detection precision is improved, but cost increases significantly
Solution Approach 1:
The patent replaces complex mechanical measurement systems with electromagnetic wave-based detection. Specifically, it uses terahertz waves to detect defects in the cylindrical shell and its coating layers, substituting expensive high-performance measurement equipment with a more cost-effective electromagnetic radiation-based detection system that achieves comparable or superior detection precision.
Solution Approach 2:
The patent employs multiple electromagnetic wave parameters (different frequencies, polarizations, and incident angles) to detect defects. By changing the detection parameters and analyzing the reflected or transmitted waves from multiple angles, the system achieves high detection precision without requiring expensive specialized equipment for each measurement dimension.
2Device complexity
If conventional detection methods are used, then cost is reduced, but detection precision is insufficient to detect internal defects
Solution Approach 1:
The patent transitions from surface-only detection to three-dimensional internal defect detection by using the penetrating capability of terahertz waves. The electromagnetic waves can pass through the cylindrical shell and coating layers to detect internal defects, adding a depth dimension to the detection capability that conventional surface methods cannot achieve.
Solution Approach 2:
The patent uses terahertz electromagnetic waves as an intermediary to indirectly detect internal defects. Rather than attempting to physically access or directly observe internal structures, the system sends electromagnetic waves through the material and analyzes the reflected, absorbed, or transmitted waves to infer the presence and characteristics of internal defects.
3Reliability
If comprehensive defect detection is performed on all interface layers, then reliability is improved, but detection time increases
Solution Approach 1:
The patent uses periodic electromagnetic wave pulses to detect defects in multiple interface layers. By sending sequential pulses at different positions around the cylindrical shell and analyzing the periodic responses, the system can comprehensively detect all interface layers efficiently without requiring excessive time for each individual measurement point.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method enables the effective detection of defects and impurities on the interface layers of solid rocket thrusters, improving structural integrity and reducing the risk of disintegration during flight.
Implementation Method 1
generating a first terahertz transmitting electromagnetic wave, and emitting the first transmitting electromagnetic wave to an inner side surface of a cylindrical shell
Implementation Method 2
detecting a plurality of first terahertz reflected electromagnetic waves reflected by the first transmitting electromagnetic wave emitted to the plurality of inner interface layers of the inner side surface
Data Source
AI summary
A cylindrical shell detection method includes generating a first and a second terahertz transmitting electromagnetic waves; detecting a plurality of first terahertz reflected electromagnetic waves reflected by the first terahertz transmitting electromagnetic wave incident in a plurality of inner interface layers of a cylindrical shell; detecting a plurality of second terahertz reflected electromagnetic waves reflected by the second terahertz transmitting electromagnetic wave incident in a plurality of outer interface layers of a cylindrical shell; measuring a plurality of first characteristic signals according to the first terahertz transmitting electromagnetic waves and the first terahertz reflected electromagnetic waves to determine a plurality of first characteristics of the plurality of inner interface layers; and measuring a plurality of second characteristic signals according to the second terahertz transmitting electromagnetic waves and the plurality of second terahertz reflected electromagnetic waves to determine a plurality of second characteristics of the plurality of inner interface layers.